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  1. MTMilitiaman

    10mm vs 357 mag in gel test

    A 155 gr .40 caliber Gold Dot @ 1200 fps and a 200 gr .40 caliber Gold Dot @ 1050 fps have nearly identical energy, but one is for sure going to expand to a greater diameter. I hate to sound rude on this, but I am the only one who has actually provided or done any real science. I have also...
  2. MTMilitiaman

    10mm vs 357 mag in gel test

    Force is mass times acceleration. Force is also one of only two variables in impulse. You literally can not separate acceleration from impulse. Time is part of impulse. You are absolutely 100% wrong on this, as I have demonstrated numerous times from numerous sources.
  3. MTMilitiaman

    10mm vs 357 mag in gel test

    Energy is not what deforms bullets. Velocity deforms bullets. This is why loading manuals list expansion velocity thresholds, not energy thresholds. The bullet loses energy as it expands, but this is because it is losing velocity as a function of increased drag.
  4. MTMilitiaman

    10mm vs 357 mag in gel test

    No, you are wrong. That is why impulse is expressed as force over time, because time is half of impulse. You can't discuss impulse and ignore the time nor is the impulse the same if the time is different. I showed you this plainly with the formula for impulse. This is...
  5. MTMilitiaman

    10mm vs 357 mag in gel test

    Just an opinion, but in my area, the 10mm has already overtook the .357 Magnum...
  6. MTMilitiaman

    10mm vs 357 mag in gel test

    You're wrong. Impulse is the amount of time it takes for a force to act on a system. A shorter impulse time is a more violent reaction. Time is half of the equation, so your example concerning the bullet going from 1200 fps in .1 sec vs 10 seconds in false, and shows a remarkable lack of...
  7. MTMilitiaman

    10mm vs 357 mag in gel test

    Bullet expansion is a product of velocity, not energy. A bullet has energy as mass and velocity. The only way the bullet does work, or loses energy, is by losing velocity or mass. A bullet expands as a matter of velocity. This is why bullet manufactures will list a minimum velocity for...
  8. MTMilitiaman

    10mm vs 357 mag in gel test

    Or if you would rather hear it from someone who designs and tests bullets rather than someone who builds $6000 rifles, here's some guys from Federal Cartridge: Starts discussing pistol ballistics at about 5 minutes...
  9. MTMilitiaman

    10mm vs 357 mag in gel test

    The 240 gr JHP @ 1300 fps will expand faster and to a greater diameter, increasing permanent wound channel size, and provide momentum for penetration, increasing permanent wound channel depth. Both of these increase the volume of the permanent wound channel, and therefore, the effectiveness of...
  10. MTMilitiaman

    10mm vs 357 mag in gel test

    Energy is irrelevant with handguns, because they don't have the velocity to use it. So power with handguns is determined by size of permanent wound channel only. And a heavier and wider bullet will typically have greater momentum, and will almost always penetrate farther and make a bigger wound...
  11. MTMilitiaman

    10mm vs 357 mag in gel test

    They have nearly identical SDs but the 200 gr 10mm has the advantage in momentum. Why would you think it would penetrate less when driven to similar velocities relative to the manufacture's recommended max?
  12. MTMilitiaman

    10mm vs 357 mag in gel test

    The 200 gr XTP @ 1250 fps is being driven much closer to its manufacture recommend max velocity than the 158 gr XTP @ 1150. The 158 gr XTP is shown in Hornady's manual, IIRC, having a max velocity threshold of 1500 fps. You could probably achieve similar results to the 10mm round in terms of...
  13. MTMilitiaman

    New SAAMI cartridge - 6.8 Westerner

    The .277s had fallen by the wayside, but has seen a revival of late. SIG introduced the .277 Fury with a fast twist barrel. Nosler has introduced a 165 gr Accubond LR and Berger a 170 gr VLD hunting. The interest in precision shooting has extended beyond the 6.5 Creedmoor. I believe more of the...
  14. MTMilitiaman

    M1 Garand: WHY is it so expensive?

    The M1 Garand is not a cheap rifle, and never has been. It requires a deferentially heat treated receiver. The recess for the left locking lug is extremely complicated and requires a special machine. Then there is the long operating rod and the complicated feed mechanism for the el bloc clip. It...
  15. MTMilitiaman

    What is the optimum weight bullet with this twist rate?

    It is actually a function of bullet length, not weight. But as diameter is fixed, heavier bullets of the same caliber are generally longer. Still, a 178 gr Hornady ELD-X is probably longer than a 220 gr RNFB. There is actually a mathematical formula, called the Greenhill Formula, for...
  16. MTMilitiaman

    Any federal fusion fans out there?

    I like the Federal Fusion MSR line. The MSR stands for Modern Sporting Rifle, and as the name implies, this ammo is designed for use in semi-automatic rifles. It has harder primers for use with free floating firing pins, and is loaded to achieve safe port pressures and best velocities from 16 to...
  17. MTMilitiaman

    300 PRC or 30 Nosler

    Again, what is this for. Both of these cartridges have ample power for any North American big game animal, and at the range most of us hunt, most animals won't be able to tell a difference. In a specially configured rifle, shooting long range, the PRC may have an advantage in being built to...
  18. MTMilitiaman

    280 Ackley and Other Stuff

    I don't see it. The physics says the Rem Mag has about the same recoil as the .30-06 out of the same weight rifle; similar bullet weights driven just slightly faster means maybe a pound or more recoil a couple fps faster than the 06. Given that the 7mm has a slight advantage over the older...
  19. MTMilitiaman

    280 Ackley and Other Stuff

    What are you using this for? Critters at common hunting distances probably aren't going to be able to tell a difference. The .280 AI will require a longer receiver and bolt throw, but will have longer range due to its access to longer, heavier VLD bullets. The .270 WSM won't have the bullet...
  20. MTMilitiaman

    What motivates your purchase of a new rifle?

    I have an addiction. It doesn't take much to motivate me to buy a new gun. Money is the limiting factor. If I have money, I am probably spending it on a guns.
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